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        /***/ 130:
        /***/ (function (module, __webpack_exports__, __webpack_require__) {

            "use strict";
            __webpack_require__.r(__webpack_exports__);

// EXTERNAL MODULE: external "element-ui/lib/utils/util"
            var util_ = __webpack_require__(3);

// CONCATENATED MODULE: ./packages/table/src/config.js


            var cellStarts = {
                default: {
                    order: ''
                },
                selection: {
                    width: 48,
                    minWidth: 48,
                    realWidth: 48,
                    order: '',
                    className: 'el-table-column--selection'
                },
                expand: {
                    width: 48,
                    minWidth: 48,
                    realWidth: 48,
                    order: ''
                },
                index: {
                    width: 48,
                    minWidth: 48,
                    realWidth: 48,
                    order: ''
                }
            };

// 这些选项不应该被覆盖
            var cellForced = {
                selection: {
                    renderHeader: function renderHeader(h, _ref) {
                        var store = _ref.store;

                        return h('el-checkbox', {
                            attrs: {
                                disabled: store.states.data && store.states.data.length === 0,
                                indeterminate: store.states.selection.length > 0 && !this.isAllSelected,

                                value: this.isAllSelected
                            },
                            nativeOn: {
                                'click': this.toggleAllSelection
                            }
                        });
                    },
                    renderCell: function renderCell(h, _ref2) {
                        var row = _ref2.row,
                            column = _ref2.column,
                            store = _ref2.store,
                            $index = _ref2.$index;

                        return h('el-checkbox', {
                            nativeOn: {
                                'click': function click(event) {
                                    return event.stopPropagation();
                                }
                            },
                            attrs: {
                                value: store.isSelected(row),
                                disabled: column.selectable ? !column.selectable.call(null, row, $index) : false
                            },
                            on: {
                                'input': function input() {
                                    store.commit('rowSelectedChanged', row);
                                }
                            }
                        });
                    },
                    sortable: false,
                    resizable: false
                },
                index: {
                    renderHeader: function renderHeader(h, _ref3) {
                        var column = _ref3.column;

                        return column.label || '#';
                    },
                    renderCell: function renderCell(h, _ref4) {
                        var $index = _ref4.$index,
                            column = _ref4.column;

                        var i = $index + 1;
                        var index = column.index;

                        if (typeof index === 'number') {
                            i = $index + index;
                        } else if (typeof index === 'function') {
                            i = index($index);
                        }

                        return h('div', [i]);
                    },
                    sortable: false
                },
                expand: {
                    renderHeader: function renderHeader(h, _ref5) {
                        var column = _ref5.column;

                        return column.label || '';
                    },
                    renderCell: function renderCell(h, _ref6) {
                        var row = _ref6.row,
                            store = _ref6.store;

                        var classes = ['el-table__expand-icon'];
                        if (store.states.expandRows.indexOf(row) > -1) {
                            classes.push('el-table__expand-icon--expanded');
                        }
                        var callback = function callback(e) {
                            e.stopPropagation();
                            store.toggleRowExpansion(row);
                        };
                        return h(
                            'div',
                            {
                                'class': classes,
                                on: {
                                    'click': callback
                                }
                            },
                            [h('i', {'class': 'el-icon el-icon-arrow-right'})]
                        );
                    },
                    sortable: false,
                    resizable: false,
                    className: 'el-table__expand-column'
                }
            };

            function defaultRenderCell(h, _ref7) {
                var row = _ref7.row,
                    column = _ref7.column,
                    $index = _ref7.$index;

                var property = column.property;
                var value = property && Object(util_["getPropByPath"])(row, property).v;
                if (column && column.formatter) {
                    return column.formatter(row, column, value, $index);
                }
                return value;
            }

            function treeCellPrefix(h, _ref8) {
                var row = _ref8.row,
                    treeNode = _ref8.treeNode,
                    store = _ref8.store;

                if (!treeNode) return null;
                var ele = [];
                var callback = function callback(e) {
                    e.stopPropagation();
                    store.loadOrToggle(row);
                };
                if (treeNode.indent) {
                    ele.push(h('span', {'class': 'el-table__indent', style: {'padding-left': treeNode.indent + 'px'}}));
                }
                if (typeof treeNode.expanded === 'boolean' && !treeNode.noLazyChildren) {
                    var expandClasses = ['el-table__expand-icon', treeNode.expanded ? 'el-table__expand-icon--expanded' : ''];
                    var iconClasses = ['el-icon-arrow-right'];
                    if (treeNode.loading) {
                        iconClasses = ['el-icon-loading'];
                    }
                    ele.push(h(
                        'div',
                        {
                            'class': expandClasses,
                            on: {
                                'click': callback
                            }
                        },
                        [h('i', {'class': iconClasses})]
                    ));
                } else {
                    ele.push(h('span', {'class': 'el-table__placeholder'}));
                }
                return ele;
            }

// EXTERNAL MODULE: ./packages/table/src/util.js
            var util = __webpack_require__(8);

// EXTERNAL MODULE: external "element-ui/lib/checkbox"
            var checkbox_ = __webpack_require__(18);
            var checkbox_default = /*#__PURE__*/__webpack_require__.n(checkbox_);

// CONCATENATED MODULE: ./packages/table/src/table-column.js
            var _extends = Object.assign || function (target) {
                for (var i = 1; i < arguments.length; i++) {
                    var source = arguments[i];
                    for (var key in source) {
                        if (Object.prototype.hasOwnProperty.call(source, key)) {
                            target[key] = source[key];
                        }
                    }
                }
                return target;
            };


            var columnIdSeed = 1;

            /* harmony default export */
            var table_column = ({
                name: 'ElTableColumn',

                props: {
                    type: {
                        type: String,
                        default: 'default'
                    },
                    label: String,
                    className: String,
                    labelClassName: String,
                    property: String,
                    prop: String,
                    width: {},
                    minWidth: {},
                    renderHeader: Function,
                    sortable: {
                        type: [Boolean, String],
                        default: false
                    },
                    sortMethod: Function,
                    sortBy: [String, Function, Array],
                    resizable: {
                        type: Boolean,
                        default: true
                    },
                    columnKey: String,
                    align: String,
                    headerAlign: String,
                    showTooltipWhenOverflow: Boolean,
                    showOverflowTooltip: Boolean,
                    fixed: [Boolean, String],
                    formatter: Function,
                    selectable: Function,
                    reserveSelection: Boolean,
                    filterMethod: Function,
                    filteredValue: Array,
                    filters: Array,
                    filterPlacement: String,
                    filterMultiple: {
                        type: Boolean,
                        default: true
                    },
                    index: [Number, Function],
                    sortOrders: {
                        type: Array,
                        default: function _default() {
                            return ['ascending', 'descending', null];
                        },
                        validator: function validator(val) {
                            return val.every(function (order) {
                                return ['ascending', 'descending', null].indexOf(order) > -1;
                            });
                        }
                    }
                },

                data: function data() {
                    return {
                        isSubColumn: false,
                        columns: []
                    };
                },


                computed: {
                    owner: function owner() {
                        var parent = this.$parent;
                        while (parent && !parent.tableId) {
                            parent = parent.$parent;
                        }
                        return parent;
                    },
                    columnOrTableParent: function columnOrTableParent() {
                        var parent = this.$parent;
                        while (parent && !parent.tableId && !parent.columnId) {
                            parent = parent.$parent;
                        }
                        return parent;
                    },
                    realWidth: function realWidth() {
                        return Object(util["l" /* parseWidth */])(this.width);
                    },
                    realMinWidth: function realMinWidth() {
                        return Object(util["k" /* parseMinWidth */])(this.minWidth);
                    },
                    realAlign: function realAlign() {
                        return this.align ? 'is-' + this.align : null;
                    },
                    realHeaderAlign: function realHeaderAlign() {
                        return this.headerAlign ? 'is-' + this.headerAlign : this.realAlign;
                    }
                },

                methods: {
                    getPropsData: function getPropsData() {
                        var _this = this;

                        for (var _len = arguments.length, props = Array(_len), _key = 0; _key < _len; _key++) {
                            props[_key] = arguments[_key];
                        }

                        return props.reduce(function (prev, cur) {
                            if (Array.isArray(cur)) {
                                cur.forEach(function (key) {
                                    prev[key] = _this[key];
                                });
                            }
                            return prev;
                        }, {});
                    },
                    getColumnElIndex: function getColumnElIndex(children, child) {
                        return [].indexOf.call(children, child);
                    },
                    setColumnWidth: function setColumnWidth(column) {
                        if (this.realWidth) {
                            column.width = this.realWidth;
                        }
                        if (this.realMinWidth) {
                            column.minWidth = this.realMinWidth;
                        }
                        if (!column.minWidth) {
                            column.minWidth = 80;
                        }
                        column.realWidth = column.width === undefined ? column.minWidth : column.width;
                        return column;
                    },
                    setColumnForcedProps: function setColumnForcedProps(column) {
                        // 对于特定类型的 column，某些属性不允许设置
                        var type = column.type;
                        var source = cellForced[type] || {};
                        Object.keys(source).forEach(function (prop) {
                            var value = source[prop];
                            if (value !== undefined) {
                                column[prop] = prop === 'className' ? column[prop] + ' ' + value : value;
                            }
                        });
                        return column;
                    },
                    setColumnRenders: function setColumnRenders(column) {
                        var _this2 = this;

                        var h = this.$createElement;

                        // renderHeader 属性不推荐使用。
                        if (this.renderHeader) {
                            console.warn('[Element Warn][TableColumn]Comparing to render-header, scoped-slot header is easier to use. We recommend users to use scoped-slot header.');
                        } else if (column.type !== 'selection') {
                            column.renderHeader = function (h, scope) {
                                var renderHeader = _this2.$scopedSlots.header;
                                return renderHeader ? renderHeader(scope) : column.label;
                            };
                        }

                        var originRenderCell = column.renderCell;
                        // TODO: 这里的实现调整
                        if (column.type === 'expand') {
                            // 对于展开行，renderCell 不允许配置的。在上一步中已经设置过，这里需要简单封装一下。
                            column.renderCell = function (h, data) {
                                return h(
                                    'div',
                                    {'class': 'cell'},
                                    [originRenderCell(h, data)]
                                );
                            };
                            this.owner.renderExpanded = function (h, data) {
                                return _this2.$scopedSlots.default ? _this2.$scopedSlots.default(data) : _this2.$slots.default;
                            };
                        } else {
                            originRenderCell = originRenderCell || defaultRenderCell;
                            // 对 renderCell 进行包装
                            column.renderCell = function (h, data) {
                                var children = null;
                                if (_this2.$scopedSlots.default) {
                                    children = _this2.$scopedSlots.default(data);
                                } else {
                                    children = originRenderCell(h, data);
                                }
                                var prefix = treeCellPrefix(h, data);
                                var props = {
                                    class: 'cell',
                                    style: {}
                                };
                                if (column.showOverflowTooltip) {
                                    props.class += ' el-tooltip';
                                    props.style = {width: (data.column.realWidth || data.column.width) - 1 + 'px'};
                                }
                                return h(
                                    'div',
                                    props,
                                    [prefix, children]
                                );
                            };
                        }
                        return column;
                    },
                    registerNormalWatchers: function registerNormalWatchers() {
                        var _this3 = this;

                        var props = ['label', 'property', 'filters', 'filterMultiple', 'sortable', 'index', 'formatter', 'className', 'labelClassName', 'showOverflowTooltip'];
                        // 一些属性具有别名
                        var aliases = {
                            prop: 'property',
                            realAlign: 'align',
                            realHeaderAlign: 'headerAlign',
                            realWidth: 'width'
                        };
                        var allAliases = props.reduce(function (prev, cur) {
                            prev[cur] = cur;
                            return prev;
                        }, aliases);

                        Object.keys(allAliases).forEach(function (key) {
                            var columnKey = aliases[key];

                            _this3.$watch(key, function (newVal) {
                                _this3.columnConfig[columnKey] = newVal;
                            });
                        });
                    },
                    registerComplexWatchers: function registerComplexWatchers() {
                        var _this4 = this;

                        var props = ['fixed'];
                        var aliases = {
                            realWidth: 'width',
                            realMinWidth: 'minWidth'
                        };
                        var allAliases = props.reduce(function (prev, cur) {
                            prev[cur] = cur;
                            return prev;
                        }, aliases);

                        Object.keys(allAliases).forEach(function (key) {
                            var columnKey = aliases[key];

                            _this4.$watch(key, function (newVal) {
                                _this4.columnConfig[columnKey] = newVal;
                                var updateColumns = columnKey === 'fixed';
                                _this4.owner.store.scheduleLayout(updateColumns);
                            });
                        });
                    }
                },

                components: {
                    ElCheckbox: checkbox_default.a
                },

                beforeCreate: function beforeCreate() {
                    this.row = {};
                    this.column = {};
                    this.$index = 0;
                    this.columnId = '';
                },
                created: function created() {
                    var parent = this.columnOrTableParent;
                    this.isSubColumn = this.owner !== parent;
                    this.columnId = (parent.tableId || parent.columnId) + '_column_' + columnIdSeed++;

                    var type = this.type || 'default';
                    var sortable = this.sortable === '' ? true : this.sortable;
                    var defaults = _extends({}, cellStarts[type], {
                        id: this.columnId,
                        type: type,
                        property: this.prop || this.property,
                        align: this.realAlign,
                        headerAlign: this.realHeaderAlign,
                        showOverflowTooltip: this.showOverflowTooltip || this.showTooltipWhenOverflow,
                        // filter 相关属性
                        filterable: this.filters || this.filterMethod,
                        filteredValue: [],
                        filterPlacement: '',
                        isColumnGroup: false,
                        filterOpened: false,
                        // sort 相关属性
                        sortable: sortable,
                        // index 列
                        index: this.index
                    });

                    var basicProps = ['columnKey', 'label', 'className', 'labelClassName', 'type', 'renderHeader', 'formatter', 'fixed', 'resizable'];
                    var sortProps = ['sortMethod', 'sortBy', 'sortOrders'];
                    var selectProps = ['selectable', 'reserveSelection'];
                    var filterProps = ['filterMethod', 'filters', 'filterMultiple', 'filterOpened', 'filteredValue', 'filterPlacement'];

                    var column = this.getPropsData(basicProps, sortProps, selectProps, filterProps);
                    column = Object(util["h" /* mergeOptions */])(defaults, column);

                    // 注意 compose 中函数执行的顺序是从右到左
                    var chains = Object(util["a" /* compose */])(this.setColumnRenders, this.setColumnWidth, this.setColumnForcedProps);
                    column = chains(column);

                    this.columnConfig = column;

                    // 注册 watcher
                    this.registerNormalWatchers();
                    this.registerComplexWatchers();
                },
                mounted: function mounted() {
                    var owner = this.owner;
                    var parent = this.columnOrTableParent;
                    var children = this.isSubColumn ? parent.$el.children : parent.$refs.hiddenColumns.children;
                    var columnIndex = this.getColumnElIndex(children, this.$el);

                    owner.store.commit('insertColumn', this.columnConfig, columnIndex, this.isSubColumn ? parent.columnConfig : null);
                },
                destroyed: function destroyed() {
                    if (!this.$parent) return;
                    var parent = this.$parent;
                    this.owner.store.commit('removeColumn', this.columnConfig, this.isSubColumn ? parent.columnConfig : null);
                },
                render: function render(h) {
                    // slots 也要渲染，需要计算合并表头
                    return h('div', this.$slots.default);
                }
            });
// CONCATENATED MODULE: ./packages/table-column/index.js


            /* istanbul ignore next */
            table_column.install = function (Vue) {
                Vue.component(table_column.name, table_column);
            };

            /* harmony default export */
            var packages_table_column = __webpack_exports__["default"] = (table_column);

            /***/
        }),

        /***/ 18:
        /***/ (function (module, exports) {

            module.exports = require("element-ui/lib/checkbox");

            /***/
        }),

        /***/ 3:
        /***/ (function (module, exports) {

            module.exports = require("element-ui/lib/utils/util");

            /***/
        }),

        /***/ 8:
        /***/ (function (module, __webpack_exports__, __webpack_require__) {

            "use strict";
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "b", function () {
                return getCell;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "i", function () {
                return orderBy;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "d", function () {
                return getColumnById;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "e", function () {
                return getColumnByKey;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "c", function () {
                return getColumnByCell;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "g", function () {
                return getRowIdentity;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "f", function () {
                return getKeysMap;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "h", function () {
                return mergeOptions;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "l", function () {
                return parseWidth;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "k", function () {
                return parseMinWidth;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "j", function () {
                return parseHeight;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "a", function () {
                return compose;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "m", function () {
                return toggleRowStatus;
            });
            /* harmony export (binding) */
            __webpack_require__.d(__webpack_exports__, "n", function () {
                return walkTreeNode;
            });
            /* harmony import */
            var element_ui_src_utils_util__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(3);
            /* harmony import */
            var element_ui_src_utils_util__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(element_ui_src_utils_util__WEBPACK_IMPORTED_MODULE_0__);
            var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
                return typeof obj;
            } : function (obj) {
                return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
            };


            var getCell = function getCell(event) {
                var cell = event.target;

                while (cell && cell.tagName.toUpperCase() !== 'HTML') {
                    if (cell.tagName.toUpperCase() === 'TD') {
                        return cell;
                    }
                    cell = cell.parentNode;
                }

                return null;
            };

            var isObject = function isObject(obj) {
                return obj !== null && (typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) === 'object';
            };

            var orderBy = function orderBy(array, sortKey, reverse, sortMethod, sortBy) {
                if (!sortKey && !sortMethod && (!sortBy || Array.isArray(sortBy) && !sortBy.length)) {
                    return array;
                }
                if (typeof reverse === 'string') {
                    reverse = reverse === 'descending' ? -1 : 1;
                } else {
                    reverse = reverse && reverse < 0 ? -1 : 1;
                }
                var getKey = sortMethod ? null : function (value, index) {
                    if (sortBy) {
                        if (!Array.isArray(sortBy)) {
                            sortBy = [sortBy];
                        }
                        return sortBy.map(function (by) {
                            if (typeof by === 'string') {
                                return Object(element_ui_src_utils_util__WEBPACK_IMPORTED_MODULE_0__["getValueByPath"])(value, by);
                            } else {
                                return by(value, index, array);
                            }
                        });
                    }
                    if (sortKey !== '$key') {
                        if (isObject(value) && '$value' in value) value = value.$value;
                    }
                    return [isObject(value) ? Object(element_ui_src_utils_util__WEBPACK_IMPORTED_MODULE_0__["getValueByPath"])(value, sortKey) : value];
                };
                var compare = function compare(a, b) {
                    if (sortMethod) {
                        return sortMethod(a.value, b.value);
                    }
                    for (var i = 0, len = a.key.length; i < len; i++) {
                        if (a.key[i] < b.key[i]) {
                            return -1;
                        }
                        if (a.key[i] > b.key[i]) {
                            return 1;
                        }
                    }
                    return 0;
                };
                return array.map(function (value, index) {
                    return {
                        value: value,
                        index: index,
                        key: getKey ? getKey(value, index) : null
                    };
                }).sort(function (a, b) {
                    var order = compare(a, b);
                    if (!order) {
                        // make stable https://en.wikipedia.org/wiki/Sorting_algorithm#Stability
                        order = a.index - b.index;
                    }
                    return order * reverse;
                }).map(function (item) {
                    return item.value;
                });
            };

            var getColumnById = function getColumnById(table, columnId) {
                var column = null;
                table.columns.forEach(function (item) {
                    if (item.id === columnId) {
                        column = item;
                    }
                });
                return column;
            };

            var getColumnByKey = function getColumnByKey(table, columnKey) {
                var column = null;
                for (var i = 0; i < table.columns.length; i++) {
                    var item = table.columns[i];
                    if (item.columnKey === columnKey) {
                        column = item;
                        break;
                    }
                }
                return column;
            };

            var getColumnByCell = function getColumnByCell(table, cell) {
                var matches = (cell.className || '').match(/el-table_[^\s]+/gm);
                if (matches) {
                    return getColumnById(table, matches[0]);
                }
                return null;
            };

            var getRowIdentity = function getRowIdentity(row, rowKey) {
                if (!row) throw new Error('row is required when get row identity');
                if (typeof rowKey === 'string') {
                    if (rowKey.indexOf('.') < 0) {
                        return row[rowKey];
                    }
                    var key = rowKey.split('.');
                    var current = row;
                    for (var i = 0; i < key.length; i++) {
                        current = current[key[i]];
                    }
                    return current;
                } else if (typeof rowKey === 'function') {
                    return rowKey.call(null, row);
                }
            };

            var getKeysMap = function getKeysMap(array, rowKey) {
                var arrayMap = {};
                (array || []).forEach(function (row, index) {
                    arrayMap[getRowIdentity(row, rowKey)] = {row: row, index: index};
                });
                return arrayMap;
            };

            function hasOwn(obj, key) {
                return Object.prototype.hasOwnProperty.call(obj, key);
            }

            function mergeOptions(defaults, config) {
                var options = {};
                var key = void 0;
                for (key in defaults) {
                    options[key] = defaults[key];
                }
                for (key in config) {
                    if (hasOwn(config, key)) {
                        var value = config[key];
                        if (typeof value !== 'undefined') {
                            options[key] = value;
                        }
                    }
                }
                return options;
            }

            function parseWidth(width) {
                if (width !== undefined) {
                    width = parseInt(width, 10);
                    if (isNaN(width)) {
                        width = null;
                    }
                }
                return width;
            }

            function parseMinWidth(minWidth) {
                if (typeof minWidth !== 'undefined') {
                    minWidth = parseWidth(minWidth);
                    if (isNaN(minWidth)) {
                        minWidth = 80;
                    }
                }
                return minWidth;
            };

            function parseHeight(height) {
                if (typeof height === 'number') {
                    return height;
                }
                if (typeof height === 'string') {
                    if (/^\d+(?:px)?$/.test(height)) {
                        return parseInt(height, 10);
                    } else {
                        return height;
                    }
                }
                return null;
            }

// https://github.com/reduxjs/redux/blob/master/src/compose.js
            function compose() {
                for (var _len = arguments.length, funcs = Array(_len), _key = 0; _key < _len; _key++) {
                    funcs[_key] = arguments[_key];
                }

                if (funcs.length === 0) {
                    return function (arg) {
                        return arg;
                    };
                }
                if (funcs.length === 1) {
                    return funcs[0];
                }
                return funcs.reduce(function (a, b) {
                    return function () {
                        return a(b.apply(undefined, arguments));
                    };
                });
            }

            function toggleRowStatus(statusArr, row, newVal) {
                var changed = false;
                var index = statusArr.indexOf(row);
                var included = index !== -1;

                var addRow = function addRow() {
                    statusArr.push(row);
                    changed = true;
                };
                var removeRow = function removeRow() {
                    statusArr.splice(index, 1);
                    changed = true;
                };

                if (typeof newVal === 'boolean') {
                    if (newVal && !included) {
                        addRow();
                    } else if (!newVal && included) {
                        removeRow();
                    }
                } else {
                    if (included) {
                        removeRow();
                    } else {
                        addRow();
                    }
                }
                return changed;
            }

            function walkTreeNode(root, cb) {
                var childrenKey = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 'children';
                var lazyKey = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 'hasChildren';

                var isNil = function isNil(array) {
                    return !(Array.isArray(array) && array.length);
                };

                function _walker(parent, children, level) {
                    cb(parent, children, level);
                    children.forEach(function (item) {
                        if (item[lazyKey]) {
                            cb(item, null, level + 1);
                            return;
                        }
                        var children = item[childrenKey];
                        if (!isNil(children)) {
                            _walker(item, children, level + 1);
                        }
                    });
                }

                root.forEach(function (item) {
                    if (item[lazyKey]) {
                        cb(item, null, 0);
                        return;
                    }
                    var children = item[childrenKey];
                    if (!isNil(children)) {
                        _walker(item, children, 0);
                    }
                });
            }

            /***/
        })

        /******/
    });